MinGW-w64 runtime library inclusion (Clang-compiled) for proper Win64 support?

[kink]

> %g (double): 2
> %g:          3.95253e-323
> to!string:   4.94066e-324
> 2.0 parsed as 2

Btw, DMD v2.063 prints similar garbage in x64 mode, just in case 
you were wondering. The huge amount of work required to 
circumvent all MSVCRT shortcomings in DRuntime and Phobos is 
probably why we won't see official Win64 support in DMD anytime 
soon, if ever.